import { upperFirst } from 'lodash-es';
export function getBoundingClientRect(element) {
    if (!element || !element.getBoundingClientRect) {
        return 0;
    }
    return element.getBoundingClientRect();
}
function trim(string) {
    return (string || '').replace(/^[\s\uFEFF]+|[\s\uFEFF]+$/g, '');
}
/* istanbul ignore next */
export function hasClass(el, cls) {
    if (!el || !cls)
        return false;
    if (cls.indexOf(' ') !== -1)
        throw new Error('className should not contain space.');
    if (el.classList) {
        return el.classList.contains(cls);
    }
    else {
        return (' ' + el.className + ' ').indexOf(' ' + cls + ' ') > -1;
    }
}
/* istanbul ignore next */
export function addClass(el, cls) {
    if (!el)
        return;
    let curClass = el.className;
    const classes = (cls || '').split(' ');
    for (let i = 0, j = classes.length; i < j; i++) {
        const clsName = classes[i];
        if (!clsName)
            continue;
        if (el.classList) {
            el.classList.add(clsName);
        }
        else if (!hasClass(el, clsName)) {
            curClass += ' ' + clsName;
        }
    }
    if (!el.classList) {
        el.className = curClass;
    }
}
/* istanbul ignore next */
export function removeClass(el, cls) {
    if (!el || !cls)
        return;
    const classes = cls.split(' ');
    let curClass = ' ' + el.className + ' ';
    for (let i = 0, j = classes.length; i < j; i++) {
        const clsName = classes[i];
        if (!clsName)
            continue;
        if (el.classList) {
            el.classList.remove(clsName);
        }
        else if (hasClass(el, clsName)) {
            curClass = curClass.replace(' ' + clsName + ' ', ' ');
        }
    }
    if (!el.classList) {
        el.className = trim(curClass);
    }
}
/**
 * Get the left and top offset of the current element
 * left: the distance between the leftmost element and the left side of the document
 * top: the distance from the top of the element to the top of the document
 * right: the distance from the far right of the element to the right of the document
 * bottom: the distance from the bottom of the element to the bottom of the document
 * rightIncludeBody: the distance between the leftmost element and the right side of the document
 * bottomIncludeBody: the distance from the bottom of the element to the bottom of the document
 *
 * @description:
 */
export function getViewportOffset(element) {
    const doc = document.documentElement;
    const docScrollLeft = doc.scrollLeft;
    const docScrollTop = doc.scrollTop;
    const docClientLeft = doc.clientLeft;
    const docClientTop = doc.clientTop;
    const pageXOffset = window.pageXOffset;
    const pageYOffset = window.pageYOffset;
    const box = getBoundingClientRect(element);
    const { left: retLeft, top: rectTop, width: rectWidth, height: rectHeight } = box;
    const scrollLeft = (pageXOffset || docScrollLeft) - (docClientLeft || 0);
    const scrollTop = (pageYOffset || docScrollTop) - (docClientTop || 0);
    const offsetLeft = retLeft + pageXOffset;
    const offsetTop = rectTop + pageYOffset;
    const left = offsetLeft - scrollLeft;
    const top = offsetTop - scrollTop;
    const clientWidth = window.document.documentElement.clientWidth;
    const clientHeight = window.document.documentElement.clientHeight;
    return {
        left: left,
        top: top,
        right: clientWidth - rectWidth - left,
        bottom: clientHeight - rectHeight - top,
        rightIncludeBody: clientWidth - left,
        bottomIncludeBody: clientHeight - top,
    };
}
export function hackCss(attr, value) {
    const prefix = ['webkit', 'Moz', 'ms', 'OT'];
    const styleObj = {};
    prefix.forEach((item) => {
        styleObj[`${item}${upperFirst(attr)}`] = value;
    });
    return {
        ...styleObj,
        [attr]: value,
    };
}
/* istanbul ignore next */
export function on(element, event, handler) {
    if (element && event && handler) {
        element.addEventListener(event, handler, false);
    }
}
/* istanbul ignore next */
export function off(element, event, handler) {
    if (element && event && handler) {
        element.removeEventListener(event, handler, false);
    }
}
/* istanbul ignore next */
export function once(el, event, fn) {
    const listener = function (...args) {
        if (fn) {
            fn.apply(this, args);
        }
        off(el, event, listener);
    };
    on(el, event, listener);
}
export function useRafThrottle(fn) {
    let locked = false;
    // @ts-ignore
    return function (...args) {
        if (locked)
            return;
        locked = true;
        window.requestAnimationFrame(() => {
            // @ts-ignore
            fn.apply(this, args);
            locked = false;
        });
    };
}
